Cost Perspective: At $601.20 per pound and used at 0.5% (the maximum recommendation for skin care) you would be adding $0.19 to your cost per one ounce of product that you make ... 601.20 (cost per pound) / 453.6 (mls per pound) = 1.326 (cost per ml) * 0.142 (0.5%) = 0.188 (cost to add 0.5% of AT155 to your product (per ounce)).